Balancing appliance.



N. w. AKIMOFF.

BALANCING APPLIANCE.

APPLICATION FILED OCT. 25, 1917. RENEWED JAN. 29.1919.

1,296,732. Y Patented Mar. 11,1919.

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SPECIALTY COMPANY,

A CORPORATION OF DELAWARE.

BALANCING APPLIANCE.

Specification of Iietters Patent.

. Application filed October 25, 1917, Serial No. 198,533. Renewed January 29, 1919. Serial No. 273,884.

States,) r es1ding at Philadelphia, in the .county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Balanclng Appliances, of which the following is a specification.

My inventionrelates to a'bala'ncing' ap pliance, 'of apparatusadapted to ascertain, for the purpose of correction, the quantum that is to say to an improved form o ynamic unbalance existingin a rotatable body such, for example, as a machine element' which for its mosteflicient operation requires that the mass be properly distributed so as to rotate without'setting up vibraof, my invention is to provide meanswheretion or objectionable periodic, stresses. The

object of my present invention is to provide a simple andeifi'cient appliance which may be readily and conveniently mounted with respect to a rotatable body whereby the amount of unbalanced distribution -of' the mass of said rotatable body may be quickly and easily determined, and a'further object I bygsaid' appliance may be actuated by the appliance which may be readily mounted on' operator while the body-under examination isbeing rotated to bringthe' appliance to a conditionto balance said rotatable body without necessitating the constant stoppage of the rotation during the test. For the accomplishment of the foregoing objects, my invention contemplatesthe provision of an a rotatable shaft adjacent the body or element iin'der examination and which is provided with means adapted to be operated during the rotation of said shaft for causing:

an angular shift of the appliance as well as iii-radial shift of the balancing weight car- 4 ried by the appliance.

The nature and characteristic features of my invention will be more readily understood from the following description taken in connection with the accompanying drawings forming part hereof, in which 'Figure 1 is a front elevational view of an appliance embodying the main features of rhyunventio'n, the same being shown mounted on a shaft .with the balancing weight shifted as required when unbalanced distribution of the mass exists in the body. .or element'under examination; Fig. 2 is a view partly in side elevation-.

Patented Mar. 11, 1919.

and partly in vertical central section of said 3 Referring to the drawings 5 is the rotatable shaft which maybe a part of the-body under examination or may be an arbor upon which the same is mounted. Mounted on said shaft is a sleeve 6 havingone end thereof Split as at 7 which end is also provided with a tapered thread 8 upon which the complementary nut 9 is threaded, which nut is adapted when advanced upon said thread to contract the split portion of the sleeve 6 to effectively clamp the sleeve 6 to the shaft 5. The other end of the sleeve Gis provided with-a bevel gear 10 for a purpose to be presently explained. It will of course be understood that a plurality of sleeves 6 having different internal diameters may be provided if desired to enable the apparatus to be used on different sized shafts.

U pon the sleeve 6 there is j ournaled a frame 11 which is limited as to longitudinal movement thereon by means of a split ring 30 which engages. a complemental; groove in sleeve 6. Extending from one side of frame 11 are two projecting guide rods 12 upon each of which is a graduated scale the purpose of which 1W1ll be later set forth. The outer ends of the rods 12 are connected by a yoke 13. A shiftable weight 14.15 slidably mounted on the rods 12, and-the distance of weight l4=-from the center of the shaft is; controlled by means of a threaded rod 15' which is journaled at its inner end in the frame 11 and at its outer end in the yoke 13.

end thereof and located outside of the yoke Attached to the threaded rod 15 at the outer 13 is a toothed wheel 16 which when 'rotated isadapted to turn the rod 15: and

thereby shift the weight 14 as to its-distance from the axis of rotation of the shaft 5. Op-

positely disposed with respect to the shift-.

able weight 14 and preferably integral with the frame 11 is a fixed counterbalancing weight 17, the mass of which is such that anylconvenient location, are bearings 18 in h the entireapplianceis thereby statically balanced when the shiftable weight 14 is lo-- catedat some predetermined position on the guide rd s '1 2. a I

Mounted on one side of the frame 11, at

which a spindle 19 is journaled and upon the end of the spindle 19 is a bevel pinion 20 which meshes with the bevel gear carried on the endof the sleeve 6. The spindle 19 also carries a toothed wheel 21 similar to the other toothed wheel 16'above referred to. The purpose of the foregoing arrangement is to cause an angular shift of the appliance about the ,aXis of the shaft 5 when the toothed wheel 21 is actuated.

Allthe'parts are accurately made, caliqbrated and balanced, so that when the shift able weight 14 is located at some predetermlned position there will be no centrifugal efi'ect caused by the appliance when the shaft I is rotated.v hen however, it is desired to shift said weight to introduce such a centrifugaleffect to counterbalance an unequal distribution of the mass of the body under examination, whichhowever may be statically' balanced, the toothed be'periodically engaged by a device which may comprise a piece of rubber 25 mounted ,rubber said wheel will upona supporting plate 26 and manually or otherwise brought into contact with -mounted. Likewise the angular position of of a floating or pendular the appliance may be readily shifted by contacting the engaging device with the wheel 21 to thereby rotate the pinion 20 which engages the gear 10, which as will be readily understood is fixedly located with respect to the shaft 5, and the angular-shift will be caused by the planetary action of the pinion 20 around the gear 10;

The operation of the device can now be readily understood. The body (not shown) which is'to be dynamically balanced by means of the appliance is first statically balanced in any preferred manner, and the appliance is then mounted on the shaft 5 which, as before stated, may be the shaft of the body itself or may be an arbor upon which the body is also mounted for the purpose of the testing, and the shaft is then mounted in any kind of a rotating device which however, for the most eflicient operation, should have at least one of its bearings character. The weight 14 is then progressively shifted during the rotation of the body as is also the angular position ofthe entire appliance ungtil all vibration is'ehminated, whereupon means for wheel 16 may- ,ried by said frame and by observing, by means of the graduated scales on rods 12, the displacement of the weight 14 which is required to overcome the dynamic unbalance existing in the body the amount of correction required may be readily determined, as alsothe angular location of the disturbing centrifugal couple,

I claim as new and desire to secure by Letters Patent is z- 1. A balancing appliance comprising,

attaching the same upon a r0tatable shaft, means for arbitrarily shifting the anglular position of the appliance with respect to said attaching means during the a shiftable weight,

rotation of said shaft, and means for arbitrarily shifting the position of said Weight in a radial direction during the rotation of said shaft.

2. A balancing appliance comprising means forattaching the same upon a rotatable shaft, a shiftable weight, and means for arbitrarily shifting the angular and radial position of said weight during the.

rotation of said shaft.

3. A balancing appliance means for attaching the same upon a rotacomprising.

tableshaft, a frame journaled with respect to said attaching means, means for arbi trarily changing the angular position of said frame upon said attaching means, a weight carried by said frame and shiftable with respect thereto in a radial direction,

and means for arbitrarily changing the po' sition of said weight.

41. A balancing appliance comprising means for attachingthe same table shaft, a frame journaled with respect to said attaching means, means for arbitrarily changing tie angular position of said frame upon said attaching means during the rotation of said shaft; a weight carried by said frame and shiftablewith reupon a rotaspect thereto in a radial direction, and

means for arbitrarily changing the position of said weight during the rotation of said A balancing means for attaching table shaft, a frame appliance comprising the same upona rotatrarilychanging the angular position of said frame upon said attaching means during the rotation of said shaft, a weight carshiftable with respect thereto in a radial direction, means for arbitrarily changing the position of said weight during the rotation of said shaft comprising a rod in threaded engagement journaled with respect -to said attachin means, means for arbi means for attaching the same upon a rotatable shaft, a frame ournaled with respect to. said attachingmeans, means for arbitrarily changing-the angular position of said frame upon said attaching means during the rotation of said shaft comprising a gear carried by said attaching means, a pinion mounted upon a spindle journaled in bearings carried by said frame and atoothed wheel carried by said spindleand adapted to be-e'xternally engaged to turn said spindle; a'z'weight carried'by said frame and shiftable with respect thereto in a radial direction; andiheans for arbitrarily changing the position of said weight during the rotation of'said shaft.

7. A balancing appliance comprising means for attaching the same upon a rotatable shaft, a frame journaled wit-h respect to said attaching means, means for arbitrarily changing theangular position of said frameuponsaid attaching. means during the rotation of'said shaft comprisv ing a gear'carried by said attaching means, a pinion mount-ed upon a sp ndle ournaled n bearings 7 carried by said frame and a toothed wheel carried by said spindle and adapted to be externally engaged to turn said spindle; a Weight carried by said frame and shiftable with respect thereto in a radial direction, means for arbitrarily changing the position of said weight during the rotation of said shaft comprising a rod in threaded engagement withsaid weight and a toothed wheel carried by said rod and adapted to be externally engaged to turn said rod. c

8. A balancing appliance comprising .means for attaching-the same upon a rotatable shaft, a frame journaled withrcspect to said'attaching means, meansfor arbitrarily changing theangular position of said frame upon said attaching means during the rotation of said shaft comprising a gear carriedby said attaching means, a pinion mounted upon a spindle journaled in bearings carried by said frame and a toothed wheel oarried'by said spindle-and adapted 'to be externally engaged to turn said spindle; a weight carried by said frame and shiftable with respect thereto, in a radial direction, means for arbitrarily changing the position of said weight during the rotation of said shaft comprising a rod in threaded engagement with said weight-and a toothed wheel ca-rried'by said rod and adapted to be externally engaged to turn said red. and a fixed counterbalancing weight carried by said frame.

9. A balancing appliance comprising means for attaching the same upona rotatable shaft, a frame journaled with respect to said attaching means, means for arbitrarilychanging the angular position of said frame upon -said attaching means comprising a gear carried by said attaching means, a pinion mounted upon a spindle journaled in bearings carried by said frame and atoothed wheel carried by said spindle and adapted to be externally engaged to turn said spindle, a weight carried by said frame and shiftable with respect thereto in.

a radial direction, and means for arbitrarily changing the" position of said weight comprising a rod in. threaded engagement with said weight and a toothed wheel carried by said rod and adapted to be externally enof said shaft, a weight carried by said frame and shiftable with respect thereto in a radial direction, and means for arbitrarily changing the position of said weight during the rotation of said shaft.

11. A balancing appliance comprising a naled upon said sleeve, means for arbitrarily.

changing the angular position of said frame upon said sleeve during the rotation of said shaft, a weight carried byv said frame and shiftable with .respect thereto in a radial direction, means for arbitrarily changing the position of said weight during the rotation of said shaft comprising a ,rod in threaded engagement with said weight and a toothed wheel carried by said rod and adapted to be externally engaged to turn said rod. 9

12. A balancing appliance comprising a sleeve adapted to be mounted upon and attached to a rotatable shaft, a frame journaled upon said sleeve, means for arbitrarily changing theangular position of said frame upon said sleeve during the rotation of said shaft comprising a gear carried by, said sleeve, a pinion mounted upon a spindle journaled in bearings carried by said frame and a toothed Wheelcarrie-d by said spindle and adapted to be externally engaged to turn said spindle; a weight carried by said frame and shiftable With respect thereto in a radial direction, and means for arbitrarily changing the position of said weight during the rotation of said shaft.

13. A balancing appliance comprising a sleeve adapted to be mounted upon and attached to a rotatable shaft, a'frame journaled upon said sleeve, means for arbitrarily changing the angular position of said frame upon sald sleeve during the rotation of said shaft comprising a gear carried by said sleeve, a pinion mounted upon a spindle journaled in bearings carried by said frame and a toothed wheel carried by said spindle and adapted to be externally engaged to turn said spindle; a weight carried by'said frame and shift-able with respect thereto in a radial direction, means for arbitrarily changing the position ofsaid Weight during the rotation of said shaft comprising a rod in threaded engagement with said Weight and a toothed Wheel carried by said rod,

,and adapted to be externally engaged to -turn said rod.

14. A balancing appliance comprising a sleeve adapted to be mounted upon and attached to a rotatable shaft, a frame journaled upon said sleeve, means for arbitrarily changing the angular position of said frame journaled in bearings carried by said frame and a toothed Wheel carried by said spindle and adapted to be externally engaged to turnsaid spindle a Weight carried by said frame and shift-able With respect thereto in a radial direction, means for arbitrarily changing the position of said Weight during the rotation of said shaft comprising a rod in threaded engagement with said Weight and a toothed Wheel carried by said rod and adapted to be externally engaged to turn said rod, and afixed counterbalancing Weight carried by said frame.

In testimony whereof I have hereunto signed my name.

NICHOLAS W. AKIMOFF. 

